On Donald Trump claiming not to know who David Duke is: "He said, 'Look. I've got a million white supremacists voting for me, how am I supposed to know all of them by name?'"

On Bernie Sanders: "It was a disappointment for Bernie. A Super Tuesday usually means he only went to the bathroom once in the middle of the night."

Katie Couric is a particularly good foil here—the serious newsperson taking a giggle-break from a trying evening—and their rapport is good enough that you can almost ignore Frank Luntz on the other end of the couch.